2012/03/02 Caterpillar

Generator Set:

C18 MARINE GS (S/N: GBM1-UP; CYN1-UP; GEN1-UP)

Marine Engine:

3406E MARINE (S/N: 9WR1-UP)

C18 MARINE (S/N: WKB1-UP; PLE1-UP; CKH1-UP; C1J1-UP; GES1-UP; KJT1-UP; JKX1-UP)

C18 MARINE ENG (S/N: J2K1-UP)

Engine News SEBD9752, 26 December 2011, "New Turbocharger Oil Supply Line Is Used On Certain C18 and 3406E Commercial Engines ". Disregard this article. Refer to the article that follows.

Description of Change: An improved tube is used on the engines that are listed above. The improved tube provides increased O-ring compression at the bolted joint, helping to eliminate engine oil leaks.

Adaptable To: The improved lines are adaptable back to the first production of the engine. Refer to Table 1 for the proper part numbers.

Table 1

Turbo Configuration	Lines Group Part Number	Line Part Number	O-Ring Part Number
Single	294-0105	205-9175	6J-2245
Single	277-5797	277-5794	6J-2245
Single	196-0220	196-0219	6J-2245
Twin	196-0220 201-1518	196-0219 196-0218	6J-2245
Twin	294-0105 201-1518	205-9175 196-0218	6J-2245
Twin	313-5659 313-5660	269-1801 303-4163	6J-2245 8L-2746

The change is effective at the factory for the serial numbers that are listed in Table 2.

Table 2

Effective Serial Numbers

S/N:9WR10674-UP

S/N:C1J01136-UP

S/N:CKH03278-UP

S/N:CYN00790-UP

S/N:GBM00586-UP

S/N:GEN00285-UP

S/N:GES00897-UP

S/N:J2K00263-UP

S/N:JKX01339-UP

S/N:KJT00210-UP

S/N:PLE00645-UP

S/N:WKB00435-UP